Aperture, ContinuedApertureThere may be times when you do not have access to light meters or the lightsettings withoutlight metersmeter in your camera is not working. You can improve your chances oftaking usable exposures if you follow the f/16 rule. The f/16 rule is based onthe correct exposure for an average front-lighted subject under bright, sunnyconditions.To use the f/l6 rule:StepAction1Set the aperture of the camera to f/16.2Set the shutter speed on the camera to most closely approximate therated ISO of the film. For example, if the film is rated at ISO 125,set the shutter speed at l/125 of a second.The f/16 rule is a way to calculate alternate f/stops should environmentalconditions deteriorate. The following table lists different aperture settingsfor daylight conditions.Conditionf/stopBright sun, light sand, or snowf/22Bright sunf/16Cloudy but brightf/11Cloudyf/8Overcast or open shadef/5.67-27